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Starting in .NET 6, the System.Runtime.CompilerServices.DisablePrivateReflectionAttribute type is marked as obsolete. This attribute has no effect in .NET Core 2.1 and later apps. Using it in code generates warning SYSLIB0015 at compile time for .NET 6 and later apps.
For more information, see https://github.com/dotnet/runtime/issues/11811.
Workarounds
None.
Suppress a warning
If you must use the obsolete APIs, you can suppress the warning in code or in your project file.
To suppress only a single violation, add preprocessor directives to your source file to disable and then re-enable the warning.
// Disable the warning.
#pragma warning disable SYSLIB0015
// Code that uses obsolete API.
// ...
// Re-enable the warning.
#pragma warning restore SYSLIB0015
To suppress all the SYSLIB0015 warnings in your project, add a <NoWarn> property to your project file.
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
...
<NoWarn>$(NoWarn);SYSLIB0015</NoWarn>
</PropertyGroup>
</Project>
For more information, see Suppress warnings.
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